When I was at the vocational school we had about 5 boxes loaded with Crapsman tools. The head of the auto department also had HIS Snap-on box there. I don't know where he got it, but the 5 Crapsman boxes all had some sort of closed-cell foam about 3/16"-1/4" thick, that was cut to the shape of the various ratchets, screwdrivers, pliers, etc. [I think "Super Dave," the shop assistant, did things like that when he wasn't busy on other projects.
What I remember is the foam didn't move--might've had spray trim adhesive on the back side, for all I know--and the tools didn't move, either.